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arXiv · 1208.3123

Inertia and chiral edge modes of a skyrmion magnetic bubble

Imam Makhfudz·Benjamin Krueger·Oleg Tchernyshyov
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Abstract

The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic textures with a nonzero skyrmion number. However, recent numerical simulations revealed that skyrmion magnetic bubbles show significant deviations from this model. We show that a skyrmion bubble possesses inertia and derive its mass from the standard theory of a thin-film ferromagnet. Besides center-of-mass motion, other low energy modes are waves on the edge of the bubble traveling with different speeds in opposite directions.

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Imam Makhfudz, Benjamin Krueger, Oleg Tchernyshyov. 2012-08-22. Inertia and chiral edge modes of a skyrmion magnetic bubble. https://doi.org/10.1103/physrevlett.109.217201

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